Alarm-clock.



No. 687,782. Patented Dec. 3, 190i.

. W. E. PORTER.

ALARM BLOCK.

(Application filed Aug. 8, 1900-) (No Model.)

W itnesses. Inventor Attorneyi TH: nonms PETERS co.v moroumoq wAsHmoToN.D. c, v

UNITED STATES PATENT OEEIcE.

WILSON E. PORTER, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE NEWV HAVENCLOCK COMPANY, OF NElV HAVEN, CONNECTICUT, A

CORPORATION OF CONNECTICUT.

ALARM-CLOCK.

SPECIFICATION forming part of Letters Patent N 0. 687,782, datedDecember 3, 1901.

Application filed August 8, 1900. Serial No. 25,814- (No model.)

To all whom it may concern.-

Be it known that I, WILsoN E. PORTER, of the city and county of NewHaven, in the State of Connecticut, have invented new and usefulImprovements in Clock-Movements, of which the following is a full,clear, and exact description when taken in connection'with theaccompanying drawings, which form a part thereof, and in which- Figure 1represents a front elevation of a clock embodying my invention; Fig. 2,a vertical central section of the same; Fig. 3, a vertical section online 3 3 of Fig. 2; Fig. 4, a detail sectional view on line 4 at of Fig.3, and Fig. 5 a detail view of the hammer-tripping mechanism andassociated parts.

In all figures similar letters of reference represent like parts.

This invention relates to clock-movements, and primarily consists in theproduction of a novel movement for the rotation of three concentricindicators at varying rates of speed bya single operating-train. Themechanism is shown applied to a so-called reminderstrike clock, in whichthe strike-hand is separate from but concentric with the minutehand,with which it is synchronously rotated by the operating-train, while itrotates at a different rate of speed from the hour-hand. It is alsocapable of movement independent from both the hour and minute hands, allof which is more fully described and claimed together with otherfeatures and combinations of parts hereinafter.

Referring to the drawings, the letterA designates the part representingthe dial or face of the clock, and ct the central opening for the hands.

C and D designate the minute and hour, respectively, and c, the rotaryminute-hand shaft, operated by the frictionally-mounted barrel-pinion E,meshing with the gear Z) of the spring-barrel B in well-known manner.

01 is the sleeve to which the hour-hand D is connected and which ismounted on the shafts.

F is the gear of the hour-hand sleeve d, meshing with a pinion G,rigidly mounted on a sleeve g on the stud g, on which sleeve 9 is alsorigidly mounted a gear H, meshing with the pinion I on the minute-handshaft 0. By

the train I, H, G, and F the rotary motion of the shaft 0 iscommunicated to the sleeve (1 of the hour-hand, but at a different rateof speed.

7; is asupplementary sleeve mounted on the sleeve d and extendingthrough the opening a and having rigidly secured thereto at its outerend the strike hand or indicator K. The sleeve 7; is capable ofindependent rotation on the sleeve d and is ordinarily operated by thetime-train by means of a pinion J, rigidly mounted thereon, meshing witha gear L, frictionally mounted on the sleeve 9 on the stud g. The gear Lis herein shown of the same size and character as the gear H, and thepinion J corresponds to the pinion I, so that the sleeve and strike-handK will be operated synchronously with the shaft 0 and minute-hand C, butat a different rate from sleeve (Z and hour-hand D. When the minute-handC is adjusted through its frictional connection with the operating-trainindependently of said operating train, the strike hand will be rotatedsynchronously with it, as well as when the minute-hand is operated bythe time-train.

77?. is a rotary shaft having a pinion M, meshing with the gear L, and acam N, adapted to swing a trip 0, secured to a rotary spindle P, onwhich is mounted the hammer R of the stationary bell r. A coiled springS keeps the trip 0 in contact with the cam N, and a knurled head T onthe rotary shaft on enables it to be rotated by the hand of theoperator.

The operation of the device is as follows: The rotation of theminute-hand shaft 0, either by the operating-train or independentlytherefrom, rotates synchronously the strike-sleeve 7s and strike-hand K,as pointed out above. The rotation of the intermediate gears H and L,mounted on the same sleeve 9, operates the rotary shaft m through thepinion M, and the cam sets in motion the tripping device 0 for swingingthe hammer to ring the bell r at certain regulated intervals or periods.To adjust the reminder striking mechanism to ring at the end of ashorter interval than that for which it is regulated, the shaft m isrotated by the head T, and by means of the pinion \I, gear L, and pinionJ the strike-in dicator sleeve is rotated independently of heoperating-train owing to the frictional mounting of the gear L on thesleeve g. By this rotation of the shaft m the strike hand or indicator Kis rotated to such a point on the dial that its further rotation by theoperating-train to the fixed point where the striking mechanism isoperated will take place at the end of the desired interval. Thuspresuming that the striking mechanism will be regularly operatedwhenever the strikehand passes the XII mark, then to have the strikeoccur in fifteen minutes instead of at the end of the hour thestrike-hand is turned by the shaft an independently of the operatingtrain until it points to IX, whence it will require fifteen minutes forthe operating-train to bring the strike-hand op-' posite the XII mark,where the strike mechanism is operated.

Having now described my invention, which may vary in detail withoutdeparting from the spirit thereof, what I claim, and desire to secure byLetters Patent, is

1. Ina clock-movement, the combination with an operating-train; of arotary shaft operated by said train; a sleeve mounted on said shaft; asecond sleeve mounted on said first sleeve; and a single counter-shaftcarrying a rotary member operated by said shaft and operating each ofsaid sleeves independently, substantially as described.

2. In a clock-movement, the combination with an operating-train; of arotary shaft operated by said train; a sleeve mounted on said shaft; asecond sleeve mounted on said first sleeve; a single counter-shaftcarrying a rotary member operated by said shaft, and directly operatingone of said sleeves; and an intermediate gear having a frictionalconnection with said rotary member and operating the other of saidsleeves, substantially as described.

3. The combination with the time-train of a clock-movement of a rotaryshaft separate from said time-train, carrying an alarm-actuating device,and having a gear rigidly mounted thereon; a strike-indicator; a rotarymember meshing with said gear and operating said strike-indicator, saidrotary member having a frictional connection with the timetrain by whichit is operated, substantially as described.

In witness whereof I have hereunto set my hand this 23d day of July,1900.

WILSON E. PORTER.

Witnesses:

GEO. W. CORY, WALTER S. SWINscoE.

